Video signal processing apparatus

• US 20040017510A1
• Filed: 03/14/2003
• Published: 01/29/2004
• Est. Priority Date: 03/18/2002
• Status: Active Grant

• Current Assignee: Pioneer Corporation, Pioneer Display Products Corporation (Pioneer Corporation)
• Original Assignee: Pioneer Corporation, Shizuoka Pioneer Corporation (Pioneer Corporation)
• Inventors: Honda, Hirofumi, Okushima, Takashi, Nagakubo, Tetsuro
• Granted Patent: US 7,187,417 B2
• Time in Patent Office: Days
• US Class Current: 348/459
• CPC Class Codes: H04N 7/0112 one of the standards corresponding to a cinematograph film standard
• CPC Class Codes: H04N 7/012 Conversion between an interlaced and a progressive signal for graphics images G09G2310/0229

Abstract

A video signal processing apparatus which performs a frame-rate conversion of a progressive line-scan video signal based on a film source of M film frames per second (wherein M is a natural number) into a video signal in which a same film frame is repeated N times for each 1/M second, and mixes, frame by frame, a video signal of a preceding frame and a video signal of a following frame of the converted progressive line-scan video signal. Thus, the display quality of telecine-converted images can be improved.

Claims

1. A video signal processing apparatus comprising:

a frame-rate converter which performs a frame-rate conversion of a progressive line-scan video signal based on a film source having M film frames per second (wherein M is a natural number) into a video signal in which a same film frame is repeated by N times for each 1/M second (wherein N is an integer of two or greater); and

a mixer which mixes, frame by frame, a video signal of a preceding frame and a video signal of a following frame of the progressive line-scan video signal converted by said frame-rate converter.

2. A video signal processing apparatus according to claim 1, wherein said mixer includes:

a first coefficient multiplier which multiplies the video signal of the following frame by a first multiplication coefficient;

a second coefficient multiplier which sets the output video signal of the first coefficient multiplier to the video signal of the preceding frame and multiplies the set video signal of the preceding frame by a second multiplication coefficient; and

an adder which adds an output video signal of said first coefficient multiplier to an output video signal of said second coefficient multiplier;

wherein the second multiplication coefficient is a value obtained by subtracting the first multiplication coefficient at that time from one.

3. A video signal processing apparatus according to claim 2, wherein the first multiplication coefficient and the second multiplication coefficient are set for each frame.

4. A video signal processing apparatus according to claim 1, wherein M is 24, N is 3, and said frame-rate converter converts the progressive line-scan video signal into a video signal in which a same film frame is repeated three times for each {fraction (1/24)} second.

5. A video signal processing apparatus according to claim 1, wherein M is 24, N is 4, and said frame-rate converter converts the progressive line-scan video signal into a video signal in which a same film frame is repeated four times for each {fraction (1/24)} second.

6. A video signal processing apparatus according to claim 1, wherein M is 24, N is 2, and said frame-rate converter converts the progressive line-scan video signal into a video signal in which a same film frame is repeated twice for each {fraction (1/24)} second.